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            | 
                    Closing price on 7/13/2009
                 |  |  
    
        |           
                
                    | Open | 13.80 |  
                    | High | 13.90 |  
                    | Low | 13.50 |  
                    | Volume | 13,100 |  
                    | Split-adjusted Price | 6.73 |  
                
             | 
 |  DTT Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 7/13/2009 | -0.10 / -0.71% | 13.80 | 13.90 | 13.50 | 13.90 | 13.90 | 6.73 | 13,100 |   |  
            | 7/10/2009 | -0.20 / -1.41% | 14.00 | 14.20 | 14.00 | 14.00 | 14.00 | 6.78 | 51,950 |   |  			
            | 7/9/2009 | -0.10 / -0.70% | 14.10 | 14.50 | 14.10 | 14.20 | 14.20 | 6.88 | 16,950 |   |  
            | 7/8/2009 | -0.70 / -4.67% | 14.30 | 15.40 | 14.30 | 14.30 | 14.30 | 6.93 | 37,010 |   |  			
            | 7/7/2009 | -0.50 / -3.23% | 15.00 | 15.50 | 15.00 | 15.00 | 15.00 | 7.27 | 5,210 |   |  
            | 7/6/2009 | +0.70 / +4.73% | 15.40 | 15.50 | 15.40 | 15.50 | 15.50 | 7.51 | 11,570 |   |  			
            | 7/3/2009 | +0.30 / +2.07% | 13.80 | 14.90 | 13.80 | 14.80 | 14.80 | 7.17 | 20,180 |   |  
            | 7/2/2009 | +0.50 / +3.57% | 14.40 | 14.70 | 13.50 | 14.50 | 14.50 | 7.02 | 39,910 |   |  			
            | 7/1/2009 | -0.70 / -4.76% | 14.00 | 14.10 | 14.00 | 14.00 | 14.00 | 6.78 | 48,490 |   |  
            | 6/30/2009 | -0.70 / -4.55% | 14.70 | 15.00 | 14.70 | 14.70 | 14.70 | 7.12 | 54,620 |   |  			
            | 6/29/2009 | -0.80 / -4.94% | 15.60 | 16.20 | 15.40 | 15.40 | 15.40 | 7.46 | 63,250 |   |  
            | 6/26/2009 | -0.80 / -4.71% | 16.20 | 16.30 | 16.20 | 16.20 | 16.20 | 7.85 | 67,120 |   |  			
            | 6/25/2009 | 0.00 / 0.00% | 17.00 | 17.00 | 16.20 | 17.00 | 17.00 | 8.24 | 15,930 |   |  
            | 6/24/2009 | +0.80 / +4.94% | 16.00 | 17.00 | 16.00 | 17.00 | 17.00 | 8.24 | 101,930 |   |  			
            | 6/23/2009 | -0.80 / -4.71% | 16.20 | 16.20 | 16.20 | 16.20 | 16.20 | 7.85 | 140 |   |  
            | 6/22/2009 | -0.50 / -2.86% | 17.00 | 17.00 | 16.70 | 17.00 | 17.00 | 8.24 | 64,950 |   |  			
            | 6/19/2009 | -0.40 / -2.23% | 18.30 | 18.30 | 17.10 | 17.50 | 17.50 | 8.48 | 108,680 |   |  
            | 6/18/2009 | +0.10 / +0.56% | 17.10 | 18.50 | 17.10 | 17.90 | 17.90 | 8.67 | 65,110 |   |  			
            | 6/17/2009 | +0.80 / +4.71% | 16.20 | 17.80 | 16.20 | 17.80 | 17.80 | 8.62 | 158,410 |   |  
            | 6/16/2009 | -0.80 / -4.49% | 17.00 | 17.00 | 17.00 | 17.00 | 17.00 | 8.24 | 12,550 |   |  			
            | 6/15/2009 | -0.90 / -4.81% | 17.80 | 17.80 | 17.80 | 17.80 | 17.80 | 8.62 | 94,580 |   |  
            | 6/12/2009 | +0.80 / +4.47% | 18.70 | 18.70 | 17.90 | 18.70 | 18.70 | 9.06 | 244,750 |   |  			
            | 6/11/2009 | +0.80 / +4.68% | 17.80 | 17.90 | 17.80 | 17.90 | 17.90 | 8.67 | 163,340 |   |  
            | 6/10/2009 | -0.80 / -4.47% | 17.10 | 17.10 | 17.10 | 17.10 | 17.10 | 8.28 | 101,760 |   |  			
            | 6/9/2009 | +0.80 / +4.68% | 17.90 | 17.90 | 17.00 | 17.90 | 17.90 | 8.67 | 346,310 |   |  
            | 6/8/2009 | +0.80 / +4.91% | 17.10 | 17.10 | 17.10 | 17.10 | 17.10 | 8.28 | 8,450 |   |  			
            | 6/5/2009 | +0.70 / +4.49% | 16.30 | 16.30 | 16.30 | 16.30 | 16.30 | 7.90 | 11,600 |   |  
            | 6/4/2009 | +0.70 / +4.70% | 15.60 | 15.60 | 15.60 | 15.60 | 15.60 | 7.56 | 9,650 |   |  			
            | 6/3/2009 | +0.70 / +4.93% | 14.90 | 14.90 | 14.90 | 14.90 | 14.90 | 7.22 | 25,320 |   |  
            | 6/2/2009 | +0.60 / +4.41% | 14.20 | 14.20 | 14.20 | 14.20 | 14.20 | 6.88 | 22,700 |   |  |